System and method for serving short message in high rate packet data system

ABSTRACT

A system and method for serving short messages in high rate packet data system for transmitting short messages to a predetermined terminal by registering location and state information of the terminal and using the registered information is disclosed. The system includes a short message service center for general short message transmission, a location and information management server for registering and managing location and state information of the terminal, and providing the information to the short message service center, a packet data service node for reporting the state information of the terminal to the Location and Information Management Server and a PCF for reporting the location information of the terminal to the Location Information Management Server, and providing call state change information of the corresponding terminal to the packet data service node.

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of Korean Application No.P2002-61692, filed on Oct. 10, 2002, which is hereby incorporated byreference as if fully set forth herein.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a system and method for servingshort message in high rate packet data system, and more particularly, toa system and method for serving short message in high rate packet datasystem to transmit short message to a HRPD terminal using location andstate information of a corresponding registered terminal.

[0004] 2. Discussion of the Related Art

[0005] A CDMA mobile communication system based on an IS-95A standardwas originally devised for voice communications between users, butchanging for high rate data service.

[0006] Although 14.4 Kbps data service is available under the IS-95Astandard, IS-95B and IS-95C (IS-2000), upper version of the IS-95A, areintroduced for basic data service and high rate data service whileremaining capability with the IS-95A.

[0007] HRPD (High Rate Packet Data) system, one of IS-2000 system, is anew packet wireless data transmission technology devised by Qualcommusing CDMA (Code Division Multiple Access), and serves the datatransmission at maximum transmitting rate of 2.4 Mbps in one directionand at maximum transmitting rate of 307.2 kbps in inverse direction.HRPD is called HDR (High Data Rate) or 1xEV-DO (1xEvolution Data Only).

[0008] SMS (Short message service) is a full duplex wireless callingservice based on a standard of a GSM (global system for mobilecommunications), and transmits data at rate of maximum 150 bytes betweenterminals. SMS exchanges SM (Short Message) including texts and/ornumbers between terminals or networks, and serves for short messagetransmission, urgent message indication, dates and time record, andmessage recognition.

[0009] Meanwhile, there was no such technology for serving shortmessages in HRPD system in the past, but IS-637-A is defined as astandard for serving the short message using IS 2000. Hereinafter,structure of a conventional short message service system in IS-2000system will be described referring to FIG. 1.

[0010]FIG. 1 is a block diagram showing the conventional short messageservice system in IS-2000 system. The conventional short message servicesystem includes a MS (Mobile Station) 11, a BTS (Base TransceiverSubsystem) 12, a BSC (Base Station Subsystem) 13, a MSC (MobileSwitching Center) 14, a SMC (Short Message Center) 15, a SMS Server(Short Message Service Server) 16, and a HLR (Home Location Register)17. The MS 11 is a terminal having software for serving short message.The BTS 12 is a base station. The BSC 13 is a control station. The MSC14 is a switchboard. The SMC 15 is a short message service center forassigning a channel of short message. The SMS server 16 is a shortmessage service server for maintaining short message users, receivingshort message service requests from the users, and transmitting therequests to the SMC 15. The HLR 17 is a home location register.

[0011] Hereinafter, a method for serving short message in a conventionalIS-2000 system on a short message system in the conventional IS-2000system structured as aforementioned.

[0012] First, the first MS 11 transmits the short message to the BTS 12for providing the short message to the second MS 11′, and the BTS 12transmits the message to the MSC 14 through the BSC 13.

[0013] The MSC 14, if the message is interpreted as a short message,transmits the corresponding short message to the SMC 15, and the SMC 15decides to which the message be delivered referring to the telephonenumber of destination in the user information at HLR 17, and transmitsthe corresponding short message to the second MS 11′ whereto the shortmessage is supposed to be delivered. In this case, the MSC 14 transmitsthe short message to the SMS server 16 for serving additional service ofinterlocking outside network, e.g., Internet.

[0014] Meanwhile, the SMS server 16 receives the short message servicerequest from the users through the MS 11, and transmits the shortmessage to the SMC 15 for serving the short message.

[0015] In this way, there was a standard (IS-637-A) for defining theshort message service in IS-2000 system in the past, but no standard fordefining the short message service in HRPD system. Therefore, there wasa problem that the short message service in HRPD system could not beprovided.

SUMMARY OF THE INVENTION

[0016] Accordingly, the present invention is directed to a system andmethod for serving short message in high rate packet data system thatsubstantially obviates one or more problems due to limitations anddisadvantages of the related art.

[0017] An object of the present invention is to provide a method forserving short messages in high rate packet data system (HRPD) byregistering location and state information of a terminal to a server,and transmitting the short message to a predetermined HRPD terminalusing the corresponding registered information.

[0018] Additional advantages, objects, and features of the inventionwill be set forth in part in the description which follows and in partwill become apparent to those having ordinary skill in the art uponexamination of the following or may be learned from practice of theinvention. The objectives and other advantages of the invention may berealized and attained by the structure particularly pointed out in thewritten description and claims hereof as well as the appended drawings.

[0019] To achieve these objects and other advantages and in accordancewith the purpose of the invention, as embodied and broadly describedherein, the method for serving the short message in HRPD system includesa SMSC (Short Message Service Center) for mainly performing the shortmessage transmission; a LIMS (Location and Info. Management Server) forregistering and managing location and state information of the terminal,and providing the short message to the SMSC; a PDSN (Packet Data ServiceNode) for reporting the state information of the terminal to the LIMS;and a PCF (Packet Control Function) for reporting the locationinformation to the LIMS, and providing call state change information tothe corresponding terminal.

[0020] In another aspect of the present invention, a method oftransmitting short messages from the short message entity to theterminal for serving short message in high rate packet data systemincludes the steps of receiving and registering information of theterminal, and transmitting the short message to the terminal usingregistered information of the terminal.

[0021] It is to be understood that both the foregoing generaldescription and the following detailed description of the presentinvention are exemplary and explanatory and are intended to providefurther explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are included to provide afurther understanding of the invention and are incorporated in andconstitute a part of this application, illustrate embodiments of theinvention and together with the description serve to explain theprinciple of the invention. In the drawings;

[0023]FIG. 1 is a block diagram illustrating a system for serving shortmessage in conventional IS-2000 system.

[0024]FIG. 2 is a block diagram illustrating a system for serving shortmessage in HRPD system in accordance with a preferred embodiment of thepresent invention.

[0025]FIG. 3 is a diagram illustrating an order of method for servingshort message in HRPD system.

[0026]FIG. 4 is a flow diagram illustrating registration process oflocation information in FIG. 3.

[0027]FIG. 5 is a flow diagram illustrating registration process ofstate information in FIG. 3.

[0028]FIG. 6 is a diagram illustrating an order of short messagedelivery process in FIG. 3.

[0029]FIG. 7 is a diagram illustrating short message delivery processaccording to state information in FIG. 6.

[0030]FIG. 8 is a diagram illustrating short message delivery process inactive state in FIG. 7.

[0031]FIG. 9 is a diagram illustrating short message delivery process indormant state in FIG. 7.

[0032]FIG. 10 is a diagram illustrating short message delivery processin idle state in FIG. 7.

[0033]FIG. 11 is a diagram illustrating short message delay/deliveryprocess according to location information in FIG. 6.

[0034]FIG. 12 is a flow diagram illustrating short messagedelay/delivery process in session close case in FIG. 11.

DETAILED DESCRIPTION OF THE INVENTION

[0035] Reference will now be made in detail to the preferred embodimentsof the present invention, examples of which are illustrated in theaccompanying drawings. Wherever possible, the same reference numberswill be used throughout the drawings to refer to the same or like parts.

[0036] Initially, a system for serving short message in high rate packetdata system in accordance with a preferred embodiment of the presentinvention will be explained referring to FIG. 2. FIG. 2 is a blockdiagram illustrating a system for serving short message in high ratepacket data system in accordance with a preferred embodiment of thepresent invention.

[0037] The system for serving short message in high rate packet datasystem in accordance with a preferred embodiment of the presentinvention includes a AT (Access Terminal) 21, a AN (Access Network) 22,a PCF (Packet Control Function) 23, a PDSN (Packet Data Serving Node)24, a LIMS (Location Info. Management Server) 25, a SMSC (Short MessageService Center) 26, and a SME (Short Message Entity) 27. The AT 21, AN22, PCF 23, PDSN 24 and SME 27 are basic structure of a conventionalHRPD system for packet wireless data service.

[0038] The AT 21 is a terminal having an IMSI (International MobileStation Identity) for serving short message. The AT 21 receives shortmessage using traffic channel or control channel (a signaling path), andoutputs the message.

[0039] The SMSC (Short Message Service Center) 26 takes primary chargesfor receiving requests for short message service from the SME 27, andtransmitting the short message to AT 21 through the AN 22.

[0040] The LIMS 25 is an information management server registering andmanaging location and state information of the AT 21, receiving requestsfor the registration information of the corresponding AT 21 from theSMSC 26, and providing registered location and state information of thecorresponding AT 21 to the SMSC 26. One LIMS 25 can be provided in thecenter of a network, or a plurality of the LIMS 25 can be dispersed. TheLIMS 25 manages an IP address allocated from the PDSN 24 and the IPaddress of the PCF 23 for the session opened AT 21.

[0041] The PDSN 24 (packet data serving nod) reports state informationof the AT 21 to the LIMS 25, helps the AT 21 receive short messageservice by providing PPP connection with the corresponding AT 21, andprovides R-P interface with the PCF 23 (The Interface between the RadioNetwork (specifically the PCF 23) and PDSN 24).

[0042] The PCF 23 is a packet controller for reporting locationinformation of the AT 21 to the LIMS 25 and providing state changeinformation (Active, Dormant, Idle) of the corresponding AT 21 to thePDSN 24. Particularly, a SC/MM function member (not shown) in thecorresponding PCF 23 performs HRPD session control function and Mobilityfunction. The PCF 23 performs UDP/IP (User Datagram Protocol/InternetProtocol) communication with the LIMS 25.

[0043] The AN 22 is an access network for receiving short messages fromthe PCF 23 and transmitting to the AT 21, transmitting the correspondingshort message to the AT 21 using traffic channel or control channel byproviding interface between the AT 21 and the packet data network.

[0044] Hereinafter, a method for transmitting short messages in highrate packet data system according to a preferred embodiment of thepresent invention referring to FIG. 3. FIG. 3 is a method for servingshort message in high rate packet data system in accordance with thepreferred embodiment. In the preferred embodiment, transmitting messagesfrom the SME 27 to the AT 21 having a predetermined IMSI will bedescribed.

[0045] Initially, the LIMS 25 registers location and state informationof the corresponding AT 21 by receiving location information of the AT21 from the PCF 23 and state information from the PDSN 24. The SMSC 26receives a request for serving short messages from the SME 27 to the AT21, and transmits the corresponding short message to the AT 21 using thelocation and state information of the AT 21, which is registered in theLIMS 25.

[0046] Hereinafter, location information registration process among thelocation and state information registration process (S301) will bedescribed referring to FIG. 4. FIG. 4 is a flow diagram showing thelocation information registration process in FIG. 3.

[0047] The PCF 23 loads location information of the corresponding AT 21on a location information registration message and transmits to thecorresponding LIMS 25 for reporting location information of thecorresponding AT 21 to the LIMS 25 according to the session change caseof the AT 21. The session change case of the AT 21 is divided into anopen case when the session between the corresponding AT 21 and the PCF23 is open, a handoff case, and a close case. The location registrationmessage includes an IMSI of the AT 21, a session change case (open,handoff, close) of the AT 21, and an IP address of the PCF 23. Thelocation registration message, in which another PCF 23 reports that theAT 21 is handoff when the AT 21 is handoff to another PCF 23, istransmitted to the LIMS 25.

[0048] The LIMS 25 receives the location registration message, registersthe location information of the AT 21 (S402), and transmits locationregistration acknowledge message to the corresponding PCF 23 forreporting weather the location information is registered to the PCF 23or not. The Location Registration Acknowledge Message includesinformation indicating weather the IMSI of the AT 21 and locationinformation of the AT 21 are registered.

[0049] Hereinafter, state information registration process among thelocation and state information registration process (S301) will bedescribed referring to FIG. 5. FIG. 5 is a diagram showing stateinformation registration process in FIG. 3.

[0050] Initially, the PDSN 24 loads state information of thecorresponding AT 21 on the state registration message, and transmits themessage to the corresponding LIMS 25 (S501) after receiving call statechange information of the AT 21 or ending the PPP connection with the AT21. Call state change of the AT 21 is divided into an active case, adormant case and an idle case of the call state change of the AT 21. Thestate registration message includes the IMSI of the AT 21, the callstate change (active/dormant/idle) of the AT 21, and the IP address ofthe AT 21.

[0051] The LIMS 25 receives the state registration message, registers(S502) state information of the AT 21, and transmits (S503) the StateRegistration Acknowledge Message to the corresponding PDSN 24 with addedinformation indicating weather the state information is registered ornot. The State Registration Acknowledge Message includes informationindicating weather the IMSI of the AT 21 and location information of theAT 21 are registered.

[0052] Hereinafter, the short message delivery process (S302) will bedescribed referring to FIG. 6. FIG. 6 is a diagram showing an order ofshort message delivery process in FIG. 3.

[0053] Initially, the SME 27 requests (S601) a short message service bytransmitting a SMS Request Message to the SMSC 26 for transmitting shortmessage to an AT 21 having a predetermined IMSI. The SMS Request Messageincludes the IMSI of the AT 21 and short message data.

[0054] The SMSC 26 receives (S602) SMS Request Message of the SME 27through the SMS Request Message, and requests (S603) location and stateinformation of the AT 21 by transmitting Registration InformationRequest Message to the LIMS 25 to know the location and state of the AT21. The Registration Information Request Message includes the IMSI ofthe AT 21.

[0055] Accordingly, the LIMS 25 receives requests of the SMSC 26 forlocation and state information of the AT 21 through the RegistrationInformation Request Message, and decides (S605) session change case ofthe corresponding AT 21 according to the registered location informationof the AT 21.

[0056] As a result of the decision (S605), if session change of the AT21 is in open or handoff, the LIMS 25 decides call state change(active/dormant/idle) of corresponding AT 21 based on the registeredstate information of the AT 21, loads state information of the AT 21corresponding to call state change on the Registration InformationReport Message, and transmits to the SMSC 26.

[0057] On the other, hand, as a result of the decision (S605), if thesession change case of the AT 21 is in ‘close’, the LIMS 25 loads thesession close location information of the corresponding AT 21 on theRegistration Information Report Message, and transmits to the SMSC 26.The corresponding SMSC 26 transmits (S607) the short message to thecorresponding AT 21 after delaying the short message delivery accordingto the location information of the corresponding AT 21 when the sessionof the AT 21 is open. The Registration Information Report Message of theAT 21 includes IMSI of the AT 21 and session change case (close) of theAT 21.

[0058] Hereinafter, a short message delivery process (S606) according tostate information of the AT will be described referring to FIG. 7, FIG.8, FIG. 9 and FIG. 10. FIG. 7 is a diagram showing the short messagedelivery process (S606) according to state information of the AT in FIG.6. FIG. 8 is a diagram showing a flow of the short message deliveryprocess in active state in FIG. 7. FIG. 9 is a flow diagram showing theshort message delivery process in dormant state in FIG. 8. FIG. 10 is aflow diagram showing the short message delivery process in idle state inFIG. 9.

[0059] Initially, as the result of the decision (S605), if sessionchange case of the AT 21 is in open or handoff, the LIMS 25 decides(S701) call state change of the corresponding AT 21 according to theregistered state information of the AT 21.

[0060] In this case, as a result of the decision (S701), if the callstate change is in active, the LIMS 25 loads active state information ofthe AT 21 on the Registration Information Report Message, and transmitsthe message to the SMSC 26 as shown in FIG. 8. The RegistrationInformation Report Message having active state information of the AT 21includes the IMSI, the call state change (active) and the IP address ofthe AT 21.

[0061] The SMSC 26 receives (S703) active state information of the AT 21through the Registration Information Report Message, and requests (S704)short message delivery to the AT 21 by transmitting a SM DeliveryRequest to the PDSN 24. The SM Delivery Request includes IMSI of the AT21, the IP address of the AT 21 and short message data.

[0062] Accordingly, the PDSN 24 receives (S705) SM Delivery Request ofthe SMSC 26 through the SM Delivery Request, and transmits (S706) theshort message to the corresponding AT 21 using the PPP connection withthe AT 21 through a traffic channel. And the AT 21 outputs the shortmessage to a user.

[0063] As shown in FIG. 9, as a result of the decision (S710), if thecall state change of the AT 21 is in dormant case, the LIMS 25 loadsdormant state information of the corresponding AT 21 on the RegistrationInformation Report Message, and transmits (S707) the message to the SMSC26. The Registration Information Report Message having the dormant stateinformation of the AT 21 includes the IMSI, call state change and the IPaddress of the AT 21.

[0064] Hence, the SMSC 26 receives (S708) the dormant state informationof the AT 21 through the Registration Information Report Message, andrequests the SM Delivery to the AT 21 by transmitting the SM DeliveryRequest to the PDSN 24. The SM Delivery Request Message includes IMSIand the IP address of the AT 21.

[0065] Accordingly, the PDSN 24 receives (S710) the SM Delivery Requestof the SMSC 26 through the SM Delivery Request Message, and transmits(S711) the SM to the PCF 23. The SM delivered to the PCF 23 includesIMSI of the AT 21 and short message data.

[0066] The PCF 23 receives (S712) the SM from the PDSN 24, search forUATI (Unicast Access Terminal Identifier) mapped with IMSI of the AT 21included in the corresponding SM after confirming that a size of the SMdata included in the corresponding SM can be transmitted using asignaling channel, and transmits (S713) the SM (SM_Page_PC2AN) to a AN22. In this case, the SM transmitted through the signaling channelincludes UATI and SM data.

[0067] Accordingly, the AN 22 receives (S714) SM transmitted through thesignaling channel from the PCF 23, and transmits (S715) the SM(SM_Page_AN2AT) to the AT 21 using the control channel. Therefore, theAT 21 outputs the SM to the user.

[0068] As shown in FIG. 10, as the result of the decision (S701), if thecall state change of the AT 21 is in idle, the LIMS 25 loads the idlestate information on the Registration Information Report Message, andtransmits (S716) the message to the SMSC 26. The RegistrationInformation Report Message having the idle state information of the AT21 includes IMSI, the call state change (idle) and the IP address of theAT 21.

[0069] The SMSC 26 receives (S717) the idle state information of the AT21 through the Registration Information Report Message, and requests(S718) the SM delivery by transmitting the SM Delivery Request to thePCF 23. In this case, the SM Delivery Request Message includes IMSI andSM data of the AT 21.

[0070] The PCF 23 receives (S719) the SM Delivery Request of the SMSC 26through the SM Delivery Request Message, searches for UATI mapped withIMSI of the AT 21 included in the corresponding SM after confirming thatthe SM data included in the corresponding SM is in transferable sizeusing a signaling channel, and transmits (S720) the SM (SM_Page_PC2AN)to the AN 22. In this case, the SM transmitted through the signalingchannel includes UATI and SM data.

[0071] Accordingly, the AN 22 receives (S721) the SM transmitted throughthe signaling channel from the PCF 23, and transmits (S722) the SM(SM_Page_AN2AT) to the AT 21 using the control channel. Hence, the AT 21outputs the SM to the user.

[0072] Meanwhile, the SM Delay/Deliver process (S607) according to thelocation information will be described referring to FIG. 11 and FIG. 12.FIG. 11 is a diagram showing an order of the SM Delay/Deliver process(S607) according to the location information in FIG. 6. FIG. 12 is aflow diagram showing the SM Delay/Deliver process in session close casein FIG. 11.

[0073] Initially, as the result of the decision (S605), if the sessionchange case is in close case, the LIMS 25 registers (S801) IMSI of thecorresponding AT 21 to a Registration Information Pending List when thecorresponding session is closed, and location and state information arenot registered to the DB.

[0074] And, the LIMS 25 loads the session close location information ofthe AT 21 on the Registration Information Report Message, and transmits(S802) the message to the SMSC 26. In this case, the RegistrationInformation Report Message having the session close location informationof the AT 21 includes IMSI of the AT 21 and the session change case(close) of the AT 21.

[0075] Accordingly, the SMSC 26 receives (S803) the session closelocation information of the AT 21 through the Registration InformationReport Message, and registers (S804) IMSI of the corresponding AT 21 andthe SM data on the Short Message Pending List.

[0076] When the session of the At 21 having IMSI registered to theRegistration Information Delay List and SM Delay List is open (S805),the PCF 23 loads the corresponding session open location information onthe Location Registration Message to report the session open locationinformation of the At 21 to the LIMS 25, and transmits (S806) themessage to the corresponding LIMS 25. In this case, the LocationRegistration Message having the session open location information of theAT 21 includes IMSI of the AT 21, the session change case of the AT 21and an IP address of the PCF 23.

[0077] Therefore, the LIMS 25 receives (S807) the location RegistrationMessage, and registers (S808) the location information of the AT 21loaded on the corresponding Location Registration Message.

[0078] If IMSI of the AT 21 is in the Registration Information DelayList, the LIMS 25 loads the session open location information of the AT21 on the report message, transmits to the SMSC 26, and deletes (S809)IMSI of the AT 21 from the Registration Information Delay List. In thiscase, the Registration Information Report Message having the sessionopen location information of the At 21 includes IMSI of the AT 21, thesession change case (open) and the IP address of the PCF 23.

[0079] The SMSC 26 receives (S810) the session open location informationof the At 21 through the Registration Information Report Message, and ifIMSI of the AT 21 is in the SM Delay List, requests SM Delivery in theSM Delay List to the AT 21 by transmitting the SM Delivery Request tothe PCF 23, and deletes IMSI of the AT 21 from the SM Delay List. Inthis case, the SM Delivery Request Message includes IMSI of the AT 21and SM data.

[0080] Thereupon, the PCF 23 receives (S812) the SM Delivery Request ofthe SMSC 26 through the SM Delivery Request Message, searches for UATImapped with IMSI of the AT 21 included in the corresponding SM afterconfirming that the SM data included in the corresponding SM is intransferable size using a signaling channel, and transmits (S813) the SM(SM_Page_PC2AN) to the AN 22. In this case, the SM transmitted throughthe signaling channel includes UATI and SM data.

[0081] The AN 22 receives (S814) the SM transmitted through thesignaling channel from the PCF 23, and transmits (S815) the shortmessage (SM_Page_AN2AT) to the AT 21 using the control channel.

[0082] It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the inventions. Thus, itis intended that the present invention covers the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

[0083] As mentioned above, the present invention provides short messageservices using the HRPD system. The present invention serves the shortmessage when the session between the terminal and the PCF is open notonly in active state where the traffic channel is allocated to theterminal but also in dormant state or idle state. In dormant or idlestate, the short message is provided without reactivation process forreallocating wireless resources.

What is claimed is:
 1. A system for serving short message in high ratepacket data system from a short message entity to a terminal,comprising: a SMSC (Short Message Service Center) for transmitting theshort message; a LIMS (Location Info. Management Server) for registeringand managing location and state information of the terminal, andproviding the information to the SMSC; a PDSN (Packet Data Service Node)for reporting state information of the terminal to the LIMS; and a PCF(Packet Control Function) for reporting location information of theterminal to the LIMS and providing call state change information of theterminal to the PDSN.
 2. The system for serving short message in highrate packet data system of claim 1, wherein the short massage entity isa terminal in high rate packet data system subscribing the short messageservice or a terminal capable of accessing the Internet.
 3. The systemfor serving short message in high rate packet data system in claim 1,wherein the short message is transmitted to the terminal by the shortmassage service center working together with the LIMS, PDSN and PCF ifthe short message service center receives a SM Delivery Request from theshort message entity.
 4. The system for serving short message in highrate packet data system in claim 3, wherein the short message servicecenter received the SM Delivery Request from the short message entitytransmits the short message using location and state information of theterminal, registered to the LIMS.
 5. The system for serving shortmessage in high rate packet data system in claim 1, wherein the PCFreports location information of the terminal according to a sessionchange case of the terminal to the LIMS.
 6. The system for serving shortmessage in high rate packet data system in claim 1, wherein the PDSNreports state information of the terminal to the LIMS according to callstate change of the terminal.
 7. The system for serving short message inhigh rate packet data system in claim 6, wherein the PDSN reports stateinformation of the terminal to the LIMS after receiving the call statechange information of the terminal from the PCF, or after ending PPPconnection with the terminal.
 8. The system for serving short message inhigh rate packet data system in claim 1, wherein the LIMS manages anInternet Protocol address of the terminal and an IP address of the PCFreporting location information of the terminal to the LIMS when the LIMSregisters and manages location information of the terminal.
 9. Thesystem for serving short message in high rate packet data system,comprising: a LIMS (Location Info. Management Server) for managinglocation and state information of a terminal in high rate packet datasystem and an IP address information of a PCF (Packet Control Function)having the terminal in high rate packet data system; and a SMSC (ShortMessage Service Center) additionally provided to the high rate packetdata network for transmitting short messages from a predetermined shortmessage entity to the terminal in high rate packet data system.
 10. Amethod for serving short messages in high rate packet data system from ashort message entity to a terminal, comprising the steps of: receivinginformation of the terminal and registering the information to the LIMS(Location Info. Management Server); and transmitting short messages tothe terminal using registered information of the terminal.
 11. A methodfor serving short messages in high rate packet data system in claim 10,wherein the terminal information registration process comprises thesteps of: transmitting location information of the correspondingterminal from the a PCF to the Location Info. Management Serveraccording to session change case of the terminal; and registering thelocation information of the terminal to the LIMS (Location Info.Management Server).
 12. A method for serving short messages in high ratepacket data system in claim 11, wherein the PCF further comprises IMSI(International Mobile Station Identity) of the terminal with a sessionchange case of the terminal and an IP address of the PCF having theterminal when the PCF transmits location information of the terminal.13. A method for serving short messages in high rate packet data systemin claim 10, wherein the terminal information registration processcomprises the steps of: transmitting state information of thecorresponding terminal in a PDSN (Packet Data Service Node) to the LIMS(Location Info. Management Server) according to the call state change ofthe terminal; and registering the state information of the terminal tothe LIMS.
 14. A method for serving short messages in high rate packetdata system in claim 13, wherein the PDSN further comprises IMSI of theterminal with the session change case of the terminal and an IP addressof the terminal when the PDSN transmits state information of thecorresponding terminal.
 15. A method for serving short messages in highrate packet data system in claim 10, wherein the short message deliveryprocess comprises the steps of: requesting short message service fromthe short message entity to the short message service center; requestinglocation and state information from the short message service center tothe LIMS; deciding the session change case of the terminal from LIMS;transmitting state information of the corresponding terminal to the SMSC(Short Message Service Center) when the session change case is open orhandoff; and transmitting the short message to the correspondingterminal using a different channel according to the corresponding stateinformation.
 16. A method for serving short messages in high rate packetdata system in claim 15, wherein the short message delivery processcomprises the steps of: transmitting session close location informationof the terminal from the LIMS to the SMSC when the session change caseis in close; and delaying the short message delivery according to thecorresponding location information, and transmitting the short messageto the corresponding terminal when the session of the correspondingterminal is open.
 17. A method for serving short messages in high ratepacket data system in claim 15, wherein the short message deliveryprocess according to the state information comprises the steps of:deciding the call state change of the LIMS; transmitting the shortmessage from the LIMS to the short message service center when the callstate change is in active; requesting the short message delivery to theterminal from the SMSC to the PDSN (packet data service node); andtransmitting the short message from the packet data service node to theterminal using a traffic channel.
 18. A method for serving shortmessages in high rate packet data system in claim 15, wherein the shortmessage delivery process according to the state information comprisesthe steps of: transmitting the dormant state information from the LIMSto the short message service center when the call state change is indormant; requesting the short message delivery to the terminal from theshort message service center to the packet data service node;transmitting the short message from the packet data service node to thePCF having the terminal; transmitting the corresponding short messagefrom the PCF received the short message to the access network having theterminal through a signaling channel; and transmitting the correspondingshort message from the access network received the short messagetransmitted through the signaling channel to the terminal using acontrol channel.
 19. A method for serving short messages in high ratepacket data system in claim 15, wherein the short message deliveryprocess according to the state information comprises the steps of:transmitting the idle state information from the LIMS to the shortmessage service center when the call state change is in idle; requestingthe short message delivery to the terminal from the short messageservice center to the PCF having the terminal; transmitting thecorresponding short message from the PCF to the access network havingthe terminal through the signaling channel; and transmitting thecorresponding short message from the access network received the shortmessage transmitted through the signaling channel to the terminal usingthe control channel.
 20. A method for serving short messages in highrate packet data system in claim 16, wherein the short message deliveryprocess according to the location information comprises the steps of:registering IMSI of the corresponding terminal from the LIMS to theregistration information delay list when the session change case is inclose; transmitting session close location information from the LIMS tothe short message service center; and registering IMSI of thecorresponding terminal and the short message data from the short messageservice center to the short message delay list.
 21. A method for servingshort messages in high rate packet data system in claim 16, wherein theshort message delivery process according to the location informationcomprises the steps of: transmitting the corresponding session openlocation information from the PCF having the base station to the LIMSwhen the session of the terminal having IMSI is open; registeringlocation information of the terminal to the LIMS, transmitting sessionopen location information to the short message center if IMSI of thecorresponding registered terminal is in the registration informationdelay list, and deleting the corresponding IMSI from the registrationdelay list; requesting the short message delivery to the correspondingterminal from short message service center received the session openlocation information to the PCF having the terminal if the correspondingIMSI is in the short message delay list, and deleting the correspondingIMSI from the short message delay list; transmitting the short messagefrom the PCF to the access network having the terminal through thesignaling channel according to the short message delivery request; andtransmitting the corresponding short message from the access networkreceived the short message transmitted through the signaling channel tothe terminal using the control channel.
 22. A terminal in high rate datasystem receiving short messages in high rate data system transmittedthrough the system of claim 1.